From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Concept of an alternator-driven electrical speedometer and proposing a test method.
| Identifier | ExFiles\Box 165\4\ img056 | |
| Date | 28th April 1930 | |
| X.6023 PN.{Mr Northey}15/WT28.4.30. S/W. EFC... from PN.{Mr Northey} X.6023 ELECTRICAL SPEEDOMETER. Referring to your EFC5/AD25,4.30. I like the idea very much of the alternator driven speed-volt-meter. Would any one of the many types of small hand-operated electric lamps now on the market be of some use to you in connection with such tests? These of course employ a small alternator, and there is no sort of moving contact or commutator. I could send you one if it would be of interest to you. P.N. | ||